.online {
    width: 1200px;
    height: 600px;
    margin: 50px auto;
    border: 1px solid slategray;

}

.online-content {
    text-align: center;

}

.online-content > div {
    margin-top: 100px;
}

.online-content span:first-child {
    color: #e69137;
    font-size: 25px;
}

.online-content span:last-child {
    color: #8b8b8b;
    font-size: 20px;

}

.online-content > div:first-child > p {
    margin-bottom: 50px;
}

/*选择器*/
.online-content input[type=text] {
    width: 600px;
    height: 30px;
    background-color: #eeeeee;
    border: 1px dashed #aaaaaa;
}

.online-content > div:last-child {
    width: 600px;
    margin: auto;
}

.online-content > div:last-child p {
    text-align: left;
}

.online-content input[type=button] {
    width: 100px;
    height: 30px;
    background-color: #e69137;
    margin: 20px;
}

textarea {
    width: 600px;
    height: 100px;
    background-color: #eeeeee;
    border: 1px dashed #aaaaaa;
}

input[type=text]:focus {
    background-color: #FF00FF;
}